Faulty spreadsheets and poor software practices can put businesses at risk.

As a new way to protect a computer network from viruses, an epidemic of antiviral protection could theoretically propagate faster through the network than the virus itself, thanks to a novel topological twist. (p. 356)

A new mathematical model of the Internet shows that it may not be as vulnerable to centralized attacks as previous research suggested. (p. 230)

A quantum computation involving a custom-built molecule furnishes experimental evidence that a quantum computer can solve certain mathematical problems more efficiently than can a conventional computer. (p. 132)